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Determine the watering interval for field which can be irrigated using surface method of irrigation with a source of water having a discharge of 1000 liters / minutes. The available moisture holding capacity of the soil is 180mm per meter and depth of root zone is 1.1m. Irrigation is done when 40% of the available moisture is used. The total losses during irrigation are  35% and peak daily moisture use is 4.5mm _______
  • a)
    15 days
  • b)
    16 days
  • c)
    17 days
  • d)
    18 days
Correct answer is option 'C'. Can you explain this answer?
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To determine the watering interval for a field irrigated using the surface method of irrigation, we need to consider several factors such as the discharge of the water source, available moisture holding capacity of the soil, depth of the root zone, irrigation efficiency, and peak daily moisture use.

Given data:
- Discharge of the water source: 1000 liters/minute
- Available moisture holding capacity of the soil: 180mm/m
- Depth of the root zone: 1.1m
- Irrigation is done when 40% of the available moisture is used
- Total losses during irrigation: 35%
- Peak daily moisture use: 4.5mm

Let's calculate the total available moisture in the root zone:

Total available moisture = Available moisture holding capacity of the soil x Depth of the root zone
Total available moisture = 180mm/m x 1.1m
Total available moisture = 198mm

Next, let's calculate the net irrigation requirement:

Net irrigation requirement = Total available moisture x (1 - irrigation efficiency) - Peak daily moisture use
Net irrigation requirement = 198mm x (1 - 35%) - 4.5mm
Net irrigation requirement = 198mm x 0.65 - 4.5mm
Net irrigation requirement = 128.7mm - 4.5mm
Net irrigation requirement = 124.2mm

Finally, let's calculate the watering interval:

Watering interval = Net irrigation requirement / Peak daily moisture use
Watering interval = 124.2mm / 4.5mm
Watering interval = 27.6 days

However, we need to consider that irrigation is done when 40% of the available moisture is used. So, the actual watering interval will be:

Actual watering interval = Watering interval / (1 - 40%)
Actual watering interval = 27.6 days / (1 - 40%)
Actual watering interval = 27.6 days / 60%
Actual watering interval ≈ 46 days

Therefore, the watering interval for the field is approximately 46 days. None of the given options (a, b, c, d) match the correct answer.
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Determine the watering interval forfield which can be irrigated usingsurface method of irrigation with asource of water having a dischargeof 1000 liters / minutes. Theavailable moisture holding capacityof the soil is 180mm per meter anddepth of root zone is 1.1m. Irrigation is done when 40% of theavailable moisture is used. Thetotal losses during irrigation are 35% and peak daily moisture use is 4.5mm _______a)15 daysb)16 daysc)17 daysd)18 daysCorrect answer is option 'C'. Can you explain this answer?
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Determine the watering interval forfield which can be irrigated usingsurface method of irrigation with asource of water having a dischargeof 1000 liters / minutes. Theavailable moisture holding capacityof the soil is 180mm per meter anddepth of root zone is 1.1m. Irrigation is done when 40% of theavailable moisture is used. Thetotal losses during irrigation are 35% and peak daily moisture use is 4.5mm _______a)15 daysb)16 daysc)17 daysd)18 daysCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Determine the watering interval forfield which can be irrigated usingsurface method of irrigation with asource of water having a dischargeof 1000 liters / minutes. Theavailable moisture holding capacityof the soil is 180mm per meter anddepth of root zone is 1.1m. Irrigation is done when 40% of theavailable moisture is used. Thetotal losses during irrigation are 35% and peak daily moisture use is 4.5mm _______a)15 daysb)16 daysc)17 daysd)18 daysCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Determine the watering interval forfield which can be irrigated usingsurface method of irrigation with asource of water having a dischargeof 1000 liters / minutes. Theavailable moisture holding capacityof the soil is 180mm per meter anddepth of root zone is 1.1m. Irrigation is done when 40% of theavailable moisture is used. Thetotal losses during irrigation are 35% and peak daily moisture use is 4.5mm _______a)15 daysb)16 daysc)17 daysd)18 daysCorrect answer is option 'C'. Can you explain this answer?.
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